KR100746711B1 - Inner Ball Joint for Automobile Steering System - Google Patents

Inner Ball Joint for Automobile Steering System Download PDF

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Publication number
KR100746711B1
KR100746711B1 KR1020030070817A KR20030070817A KR100746711B1 KR 100746711 B1 KR100746711 B1 KR 100746711B1 KR 1020030070817 A KR1020030070817 A KR 1020030070817A KR 20030070817 A KR20030070817 A KR 20030070817A KR 100746711 B1 KR100746711 B1 KR 100746711B1
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KR
South Korea
Prior art keywords
ball
ball head
head
housing
ball joint
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KR1020030070817A
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Korean (ko)
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KR20050034996A (en
Inventor
장석모
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주식회사 만도
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Priority to KR1020030070817A priority Critical patent/KR100746711B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0661—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the two co-operative parts each having both convex and concave interfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0604—Construction of the male part

Abstract

본 발명은, 볼 헤드가 볼 하우징 내에 안정적으로 밀착된 상태에서 원활하게 회전 및 요동할 수 있는 구조를 가짐과 아울러 보다 더 향상된 내마모 성능을 갖는 자동차 조향장치의 이너 볼 조인트를 개시한다.The present invention discloses an inner ball joint of a vehicle steering apparatus having a structure capable of smoothly rotating and oscillating in a state where the ball head is stably in close contact with the ball housing, and having further improved wear resistance.

본 발명의 구성은, 외주면에 플라스틱 몰딩부가 형성된 볼 헤드; 상기 볼 헤드가 직접 삽입된 채로 회전 및 요동할 수 있도록 상기 볼 헤드의 플라스틱 몰딩부 형상을 따라 볼 삽입구가 형성된 볼 하우징으로 이루어진 것을 특징으로 한다.
The configuration of the present invention, the ball head formed with a plastic molding on the outer peripheral surface; Characterized in that the ball housing is formed with a ball insertion hole along the shape of the plastic molding of the ball head so that the ball head can rotate and swing while being directly inserted.

조향장치, 스티어링, 이너 볼 조인트, 볼 헤드, 플라스틱, 몰딩, 볼 시트Steering, Steering, Inner Ball Joint, Ball Head, Plastic, Molding, Ball Seat

Description

자동차 조향장치의 이너 볼 조인트{Inner Ball Joint for Automobile Steering System} Inner Ball Joint for Automobile Steering System             

도 1 : 종래 이너 볼 조인트의 구성 요소들을 분리 도시한 정면도1: Front view showing the separation of the components of the conventional inner ball joint

도 2 : 종래 이너 볼 조인트의 조립 상태를 나타낸 정면도2: Front view showing the assembled state of the conventional inner ball joint

도 3 : 본 발명에 따른 이너 볼 조인트의 구성 요소들을 분리 도시한 정면도3 is a front view showing the separation of the components of the inner ball joint according to the present invention

도 4 : 본 발명에 따른 이너 볼 조인트의 조립 상태를 나타낸 정면도4 is a front view showing the assembled state of the inner ball joint according to the present invention

도 5 : 본 발명의 이너 볼 조인트에서 볼 헤드의 다른 실시예를 나타낸 도면5 is a view showing another embodiment of the ball head in the inner ball joint of the present invention

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1 : 타이 로드 1a : 볼 헤드1: Tie Rod 1a: Ball Head

1b : 플라스틱 몰딩부 2 : 볼 하우징1b: plastic molding part 2: ball housing

2a : 볼 삽입구
2a: ball insertion hole

본 발명은 자동차의 조향장치 분야에 관련된 기술로서, 보다 상세하게는, 타 이 로드의 말단부에 구비되는 볼 헤드와 볼 하우징으로 구성된 이너 볼 조인트에 관한 발명이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the art of steering of automobiles, and more particularly, to an inner ball joint composed of a ball head and a ball housing provided at the distal end of a tie rod.

자동차의 스티어링이나 서스펜션 계통의 관절부에는 통상적으로 볼 조인트가 사용되고 있다. 특히, 스티어링장치에서는 스티어링 기어로부터의 힘을 차륜에 전달하는 조향 링키지의 연결부에 이너 볼 조인트가 사용됨으로써, 차륜의 충격이나 샤시 스프링의 휨 등에 의해 손상이 가해지지 않도록 하게 된다.Ball joints are commonly used in the joints of automobile steering and suspension systems. In particular, the inner ball joint is used at the connection portion of the steering linkage that transmits the force from the steering gear to the wheel, so that the damage is not caused by the impact of the wheel or the bending of the chassis spring.

첨부도면 도 1에는 종래 이너 볼 조인트의 구성이 나타나 있다. 도시된 바와 같이, 이너 볼 조인트는, 타이 로드(10)의 말단부에 형성된 볼 헤드(10a)와, 볼 시트(20), 그리고 볼 하우징(30)으로 이루어져 있다. 이에 따라, 도 2에서와 같이, 볼 하우징(30)의 내부에 볼 시트(20)가 안착되고, 이 볼 시트(20)안에는 타이 로드(10)의 볼 헤드(10a)가 안착되는데, 이 상태에서 볼 헤드(10a)와 볼 시트(20)가 볼 하우징(30)으로부터 빠지지 않도록 볼 하우징(30)의 끝부분이 프레스로 코킹됨으로써 볼 조인트로서의 기능이 가능하게 된다.In the accompanying drawings, a configuration of a conventional inner ball joint is shown. As shown, the inner ball joint consists of a ball head 10a formed at the distal end of the tie rod 10, a ball seat 20, and a ball housing 30. Accordingly, as shown in FIG. 2, the ball seat 20 is seated inside the ball housing 30, and the ball head 10a of the tie rod 10 is seated in the ball seat 20, which is in this state. In order to prevent the ball head 10a and the ball seat 20 from being removed from the ball housing 30, the end of the ball housing 30 is caulked with a press to enable a function as a ball joint.

그런데, 이와 같이 볼 헤드(10a)와 볼 하우징(30) 사이에 볼 시트(20)가 개재되는 구성으로 이루어진 종래의 이너 볼 조인트에서는, 볼 시트(20)가 볼 하우징(30)에 안정적으로 밀착되지 않고 유격(遊動離隔)이 발생할 우려가 있다. 이로 인해, 볼 헤드(10a)가 볼 하우징(30) - 엄밀히 말하면, 볼 시트(20) - 에 완전히 접촉하지 않고 유격이 발생된 채로 회전 또는 요동하게 되어 마모가 촉진될 뿐만 아니라, 볼 헤드(10a)의 원활한 회전 및 요동이 곤란해짐으로써 볼 조인트로 서의 기능을 온전히 발휘할 수 없게 되는 문제가 있다.
By the way, in the conventional inner ball joint which consists of the structure which the ball seat 20 is interposed between the ball head 10a and the ball housing 30 in this way, the ball seat 20 adheres to the ball housing 30 stably. There is a risk of free play. Due to this, the ball head 10a is not completely contacted with the ball housing 30-strictly speaking, the ball seat 20-but rotates or oscillates with a clearance therebetween, thereby promoting wear and promoting the ball head 10a. This makes it difficult to smoothly rotate and swing, making it impossible to fully function as a ball joint.

본 발명은 전술한 바와 같은 종래의 문제점을 개선하기 위해 안출된 것으로서, 그 목적은, 볼 헤드가 볼 하우징 내에 안정적으로 밀착된 상태에서 원활하게 회전 및 요동할 수 있는 구조를 가짐과 아울러 보다 더 향상된 내마모 성능을 갖는 자동차 조향장치의 이너 볼 조인트를 제공하는 데에 있다.
SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and an object thereof is to further improve the ball head in a state in which the ball head can be rotated and oscillated smoothly while being stably in contact with the ball housing. The present invention provides an inner ball joint of a vehicle steering device having wear resistance.

위와 같은 목적을 달성하기 위한 본 발명에 따른 자동차 조향장치의 이너 볼 조인트는, 외주면에 플라스틱 몰딩부가 구비된 볼 헤드; 상기 볼 헤드가 직접 삽입된 채로 회전 및 요동할 수 있도록 상기 볼 헤드의 플라스틱 몰딩부 형상을 따라 볼 삽입구가 형성된 볼 하우징으로 이루어진 것을 특징으로 한다.Inner ball joint of the vehicle steering apparatus according to the present invention for achieving the above object, the ball head provided with a plastic molding on the outer peripheral surface; Characterized in that the ball housing is formed with a ball insertion hole along the shape of the plastic molding of the ball head so that the ball head can rotate and swing while being directly inserted.

여기서, 상기 볼 헤드의 외주면에 상기 플라스틱 몰딩부가 견고하게 형성되도록 하기 위한 요철이 형성될 수도 있다.
Here, unevenness may be formed on the outer circumferential surface of the ball head so that the plastic molding part is firmly formed.

이하에서는 본 발명의 바람직한 실시예를 첨부도면에 의거하여 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부도면 도 3은 본 발명에 따른 이너 볼 조인트의 구성 요소들을 분리 도시한 정면도이다. 도면에 도시된 바와 같이, 본 발명의 이너 볼 조인트는 종래의 볼 시트가 배제되고 볼 헤드(1a)와 볼 하우징(2)만으로 구성된다. 즉, 타이 로드(1)의 말단부에 볼 헤드(1a)가 구비되되, 이 볼 헤드(1a)의 외주면에는 전체적으로 플라스틱 몰딩이 이루어짐으로써, 이 플라스틱 몰딩부(1b)에 의해 볼 헤드(1a)의 표면이 피복된 구조를 갖는다. 더욱이, 도 5에서와 같이, 볼 헤드(1a)의 표면에 요철이 형성되어 있으면 플라스틱 몰딩이 보다 견고하게 이루어지게 된다. 한편, 볼 하우징(2)에는, 도 3에서와 같이, 볼 헤드(1a)의 외주면에 피복된 플라스틱 몰딩부(1b)의 형상을 따라 볼 삽입구(2a)가 형성되어 있다. 이에 따라, 도 4와 같이, 볼 헤드(1a)가 볼 하우징(2)의 볼 삽입구(2a)에 직접 삽입됨으로써, 종래와 같은 볼 시트가 불필요하게 된다.Accompanying drawings Figure 3 is a front view showing the separated components of the inner ball joint according to the present invention. As shown in the figure, the inner ball joint of the present invention excludes the conventional ball seat and consists only of the ball head 1a and the ball housing 2. That is, the ball head 1a is provided at the distal end of the tie rod 1, and plastic molding is entirely performed on the outer circumferential surface of the ball head 1a, whereby the plastic molding part 1b of the ball head 1a is provided. It has a surface-coated structure. In addition, as shown in FIG. 5, if irregularities are formed on the surface of the ball head 1a, plastic molding is more firmly performed. On the other hand, in the ball housing 2, as shown in FIG. 3, the ball insertion hole 2a is formed along the shape of the plastic molding part 1b coated on the outer peripheral surface of the ball head 1a. As a result, as shown in FIG. 4, the ball head 1a is directly inserted into the ball insertion port 2a of the ball housing 2, thereby eliminating the need for a conventional ball seat.

이와 같이, 본 발명의 이너 볼 조인트는, 볼 헤드(1a)를 안착시키기 위한 볼 시트가 배제되고 볼 헤드(1a)와 볼 하우징(2)만으로 구성되어 볼 헤드(1a)가 볼 하우징(2)에 직접 삽입된 구조를 가지기 때문에, 종래 볼 시트로 인해 크게 발생하던 볼 헤드의 유격 현상이 거의 발생하지 않게 된다. 특히, 발명자의 실험에 따르면, 볼 하우징(2)의 볼 삽입구(2a)에 삽입된 볼 헤드(1a)의 구면 접촉률이 종래 75%보다 큰 95%로 나타나고 있어, 볼 헤드(1a)의 회전 및 요동으로 인한 마모의 발생이 그만큼 저감되므로 내마모성이 향상된 것을 알 수 있었다.
As described above, the inner ball joint of the present invention excludes the ball seat for seating the ball head 1a and is composed of only the ball head 1a and the ball housing 2 so that the ball head 1a is the ball housing 2. Since the structure is directly inserted into the ball head, the gap between the ball head, which is largely generated due to the conventional ball seat, hardly occurs. In particular, according to the experiments of the inventors, the spherical contact ratio of the ball head 1a inserted into the ball insertion hole 2a of the ball housing 2 is represented as 95%, which is larger than the conventional 75%, so that the rotation of the ball head 1a and Since the occurrence of abrasion due to the fluctuation is reduced by that, it was found that the wear resistance was improved.

이상에서 설명한 바와 같이, 본 발명에 따른 자동차 조향장치의 이너 볼 조인트는, 볼 하우징으로부터 볼 헤드의 유격이 거의 발생하지 않고 볼 헤드의 구면 접촉률이 커짐으로 인해 볼 헤드와 볼 하우징의 마모가 저감됨으로써 내마모성 향상과 제품 수명 향상의 효과를 발휘한다.As described above, the inner ball joint of the automobile steering apparatus according to the present invention is reduced in the wear of the ball head and the ball housing due to the little contact between the ball head from the ball housing and the spherical contact ratio of the ball head is increased. It has the effect of improving wear resistance and product life.

또, 본 발명은, 볼 헤드가 볼 하우징 내에서 원활하게 회전 및 요동할 수 있게 되므로, 보다 향상된 볼 조인트 성능이 기대된다.Further, in the present invention, the ball head can smoothly rotate and swing in the ball housing, and therefore, improved ball joint performance is expected.

또한, 본 발명은, 종래의 볼 시트가 배제되고 단순한 플라스틱 몰딩으로 대체되므로 소요 부품수의 저감과 조립공정의 생략이 가능하여 비용 절감의 효과도 기대된다.In addition, the present invention, the conventional ball sheet is excluded and replaced by a simple plastic molding, it is possible to reduce the number of parts required and the elimination of the assembly process is expected to reduce the cost.

Claims (2)

외주면에 플라스틱 몰딩부가 구비된 볼 헤드; 및A ball head provided with a plastic molding on an outer circumferential surface thereof; And 상기 볼 헤드가 직접 삽입된 채로 회전 및 요동할 수 있도록 상기 볼 헤드의 플라스틱 몰딩부 형상을 따라 볼 삽입구가 형성된 볼 하우징으로 구성되고,The ball head is formed of a ball housing formed along the shape of the plastic molding of the ball head so that the ball head can be rotated and rocked while being directly inserted, 상기 볼 헤드의 외주면에 상기 플라스틱 몰딩부가 견고하게 형성되도록 하기 위한 요철이 형성된 것을 특징으로 하는 자동차 조향장치의 이너 볼 조인트.The inner ball joint of the vehicle steering apparatus, characterized in that irregularities are formed on the outer circumferential surface of the ball head so that the plastic molding is firmly formed. 삭제delete
KR1020030070817A 2003-10-11 2003-10-11 Inner Ball Joint for Automobile Steering System KR100746711B1 (en)

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KR100746711B1 true KR100746711B1 (en) 2007-08-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103895705A (en) * 2014-04-11 2014-07-02 重庆隆鑫机车有限公司 Beach buggy direction pull rod assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
공개특허공보 제1993-9811호

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103895705A (en) * 2014-04-11 2014-07-02 重庆隆鑫机车有限公司 Beach buggy direction pull rod assembly

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